Quick-action retention valve for wells



Nov. 27, 1928.

B. H. scoTT ET AL QUICK ACTION RETENTION VALVE FOR WELLS Original Filed Oct. 6, 1926 Patented Nov. 27, 1928.

1,693,255 UNITED STATES PATENT OFFICE.

BERNARD H. SCOTT, OF GLENDALE, AND SAMUEL ROSS, OF LONG BEACH, CALI- FORNIA, ASSIGNORS TO SCOTT-ROSS AND COMPANY, 015 LOS ANGELES, CALIFOR- N IA, A CORPORATION OF DELAWARE.

QUICK-ACTION RETENTION VALVE FOR WELLS.

Application filed October 6, 1926, Serial No. 139,848. Renewed October 9, 1928.

closed until the pump plunger had moved downwardly sufficiently to compress the fluid between the plunger valveand the standing valve below to a pressure greater than the pressure. exerted by the weight of the fluid column above, thereby losing a certain percentage of each stroke, and this percentage of loss is greater in direct relation to the additional depth of the wells being pumped.

Another object of our inventionis to provide a retention valve which can be installed with the sucker-rods and pump and when once in place it can only move a very short distance, thus assuring quick action in opening .and closing. a 7

Another object of our invention is to provide in such a device a retention valve seat Our retention valve seat can also be removed,

and replaced with a new seat incase of wear,

thus making it possible to use a retention valve body for an indefinite period.

Another object of our invention is to provide a device of the character referred to which requires no stufiing boxesor packing of any kind, the center rod being a sliding fit sealed with the fluid being pumped.

Other objects and advantages will be apparent from the following description ofrone practical embodiment of our invention, taken with theaccompanying sheet of drawings, in which:

Figure 1 is a vertical sectional view through a retention valve embodying our invcntion;

Figure 2 is an upper end view of the retention valve body;

F1 igure 3 is a side elevation of the same; an(

Figure 4 is a view showing a well tubing with pumping mechanism therein, with our retention valve shown in connection therewith, said view being partly in section.

Referring now in detail to the drawings, F g. 4, 5 designates the usual'well' tubing, with a standing valve, 6, at the lower end thereof, and 7 designates a plunger valve, connected to and operated by a plunger rod, 8, said rod having a reduced portion, as 8, for a purpose hereinafter again referred to. Our invention includes in combination, a tubular section, opposite ends to'be connected into said well tub ng, 5, as seen in Fig. 4, and provided with an inner annular shoulder, 10, to receive an annular valve seat member, 11, held in place by means of an inner sleeve, 12, externally threaded at its lower end and having threaded engagement with the interior of said tubularszection 9, as at 13, thus clamping said valve seat member 11, in place, substantially in the manner illustrated. Said inner sleeve member 12 is increased in thickness at-its upper end'to provide the annular beveled shoulder, 12, which operates as a stop for the upper movement of the valve member now to be described; v V

The retention valve member is designated, 14, has a smooth bore, 15, through the center which fits a smooth rod section, 16, of the plunger rod, 8, said fit being a sliding fit with said retention valve member, 14. Said retention valve member 14, is reduced at its lower end to'provide the annular shoulder, 17, below which the body is cut away to form clearance passageways, as 18, 18, between said body portion and the inside of the member, 9, whereby when said valve member, 14, is raised to lift the annular shoulder, 17, from the valve seat member 11, fluid canmove up wardly around said valve member 14, through said annular valve seat member, 11, and upwardly through the inner sleeve, 12. -The upper end is similarly cut away from said valve body, as at 19, 19, as will be better understood by reference to the end View thereor in Fig..2,-the upper; end or said v alve body being in the upper end of said inner sleeve or member, 12. Two radially sliding dogs, 20,

same set in the body 14L, as will be clear from V 5 Fig. 1, having elongated openings, as 21,

therein, and held in place by pins, 22. The

dogs act as stops for the upward movement of said body member. On the upward movement of the valve body, 1 said logs engage 1 0 the shoulder, 12, and prevent further upward movement of said body, but this is sruticient to unseat said valve body, 1%, at its shoulder, 17,1rom the valve seat member 11. On the downward movement, said valve member '15 stopped by the valve seat. .7 When said valve member, 1 1, is seated on'the valve seat member, 11, the passageway down through said valve mechanism is closerhand when said valvemember 1s htte'd, as on thehit'or up 2o ward stroke of the plunger rod, 8, fluid passes upwardly through said valve seat member,v

11,.around the'lower or reduced end of said valve member, and upwardly around the round ormiddle portion or said valve memherald; Thus said valve member has a short movement before the dogs, 20, 20, en gage with the'. shoulder, 1%, 1n the sleeve member, 12.

While the use and operation 01' the d'evice will be understood 't'romthe foregoing description, it may be brieilyrestated as follows: The-up stroke ofthe plunger rod, 5, andthe plunger valve, 7, lifts a column of fluid up through said retention valve, lifting said valve member 14, as above described and allowing the fluid to pass upwardly through said retention valve mechanism. As soon said plunger valve, 7, and said plunger rod, 5, enn-t to move downwardly, said retention val-vemember, 1 1, seats on the valve seat member- 11, thusretaining or holding the column of fluid above said valve member and reducing the weight on the plunger valve member 7, and allowing it to open on its downward stroke to pick up another quantity of fluid,

in-a manner well understood.

whereuponsaid dogs are free to move 1nwardly into said reduced portion, 8 and their outer ends will then pass the shoulder, 12 and permit said retention valve member 1 1, ,to be withdrawn with saidplunger rod and plunger valve 7, for any purpose.

- To this end, the distance between the dogs 20 and the bottom of the valve member 14,

corresponds to the distance between the top of the cage or, the plunger valve 7 and the 6O gro 8:1 7

Thus we have provided a simple, practical and eflicient quick acting retention valve for use in, combination with a well tub and pump ing mechanism, and while we have shown and 5 described one practical embodiment thereof,

we are aware that changes in details can be made without departing from the spirit of the invention, and we do not limit our invention to the details shown :torde'scriptive purposes, enceptas we'may belimited by the hereto appended claims; r

lVe, claim 1. A retention valve for wells comprising in combination with a welltube', plunger rod and plunger valve,a tubular member connected into said welltube, an annular valve seat therein, a valve member having a sliding fiton a portion or said plunger rod within said tubular member and having an annular shouldor adapted to seat upon said anular valve seat to close. the opening theretln'ough, movable means carried as a part thereof-for limiting the upward movement or said valve member away from said seat whereby to permit flow throu h said annular valve seat, and means for rt easing said movable-means on said valve member whereby it? canbe lifted out or said tubular member with said plunger rod.

2. A retention valvetor wells comprising incombination with a well tube, plunger rod and plunger valve, of a tubular member forming apart of: said well tube and having. an annular valve seat therein, a valve member having an annular valve shoulder adapted to seat upon said 'valve seat to close said valve seat, said valve member having a sliding fit upon a part of said plunger rod, means on said valvemember for limiting its upward movement, a partin saidtubular member to be engaged by said means, and means for rendering said limit means inoperative, whereby said valve member can be lifted with said plunger rod from said tubular member.

3. A retention valve for wells including in oombinatiom'a tubular member, an annular valve seattherein, a valvemember having a valve seat shoulder adapted to seatupon said annular valve seat to close the same, a rod. section having sliding fit through said valve member and adapted to be connected to the plunger rod of a pumpingmechanism, limit stops for limiting the upward movement or said valve memberaway from said valve seat, whereby to open passageway throughsaid tubular member, and means for rendering said limit stops inoperative to permit said valve member to'be lifted out ot'said tubular member with said rod section. v

e. A retention valve of the character referred toincluding a tubular member to be connected into a well tubing, a removable annular valve seatmember therein, a valve member seated thereupon and adapted to close said valve seat, a section of rod having a sliding fit through saidvalve member, limit stops on said valve member for limiting the movement of said valve member av'vayfrom said valve seat, means within said tubular member to beengaged'bysaid limit stops, and means whereby said limit steps can be Jun lll)

rendered inoperative to permit said valve member to be lifted by said rod section out of said tubular member.

5. A quick acting retention valve for wells including a tubular member, an annular valve seat member therein, a sleeve having screw engagement with said tubular member and securing said valve seat member in place, said sleeve having an inner annular shoulder, a valve member in said sleeve and seated upon said valve seat member to close the same, a rod having a sliding fit through said valve member, stop dogs carried by said valve member and adapted to engage the inner annular shoulder in said sleeve to limit the movement of said valve member away from said valve seat member to open passageway through said tubular member and inner sleeve, and means for rendering said stop dogs inoperative to permit said valve member to move out of said sleeve with said rod.

6. A quick acting retention valve including a tubular member to be connected into a well tube, an annular valve seat member therein, a valve member seated through said valve seat member and closing the same when seated thereupon, the lower end of said valve member being cut away to permit flow of fluid upwardly through said valve seat when said valve member is lifted, a rod having a sliding fit through said valve member, stop dogs carried by said valve member and adapted to limit the movement of said valve member away from the valve seat, and a reduced portion on said rod adapted to permit said stop dogs to move thereinto to render them inoperative, for lifting said valve member with said rod out of said tubular member.

7 A quick acting retention valve including a tubular member threaded at its opposite ends to be connected into a well tubing, an annular valve seat member therein, a valve member having asmaller part extended through said valve seat member and a part forming a valve to seat upon and close said annular valve seat member, a rod having a sliding fit through said valve member, radially movable stop elements carried by said valve member, and means within said tubular member to be engaged by said stop elements to limit the movement of said valve member away from said valve seat, said rod having a reduced portion adapted to receive the inner ends of said stop elements when in register therewith to render them inoperative as stops, whereby to permit said valve member to be removed from said tubular member with said rod.

8. In a device of the character referred to, a tubular member having an inner annular valve seat, a valve member seated thereupon and closing the same, said valve member having a portion extended through said valve seat and reduced to permit upflow through said valve seat around said valve member when the latter is raised, movable stop elements carried by said valve member, means Within said tubular member above said stop elements to be engaged thereby to limit the upward movement of said valve member, a rod having a sliding fit through said valve member, and means on said rod adapted to render said stop elements inoperative when desired to remove said valve member with said rod from said tubular member.

Signed at Los Angeles, Los Angeles County, California, this 30th day of September, 1926.

BERNARD H. SCOTT. SAMUEL E. ROSS. 

